Microtensile bond strength of self-etching and self-adhesive resin cements to dentin and indirect composite resin

Abstract

The purpose of this study was to evaluate the microtensile bond strength (μTBS), failure modes andbonding interfaces of self-etching and three self-adhesive resin cements to dentin and indirect compositeresin. Cylindrical composite blocks (Tescera, Bisco Inc.) were luted with resin cements (PA: Panavia F 2.0,Kuraray Medical Inc., RE: RelyX Unicem Clicker, 3M ESPE., MA: Maxem, Kerr Co., BI: BisCem, BiscoInc.) on the prepared occlusal dentin surfaces of 20 extracted molars. After storage in distilled water for 24h, 1.0 mm ×1.0 mm composite-dentin beams were prepared. μTBS was tested at a cross-head speed of0.5 mm/min. Data were analyzed with one-way ANOVA and Tukey’s HSD test. Dentin sides of all frac-tured specimens and interfaces of resin cements-dentin or resin cements-composite were examined at FE-SEM (Field Emission-Scanning Electron Microscope). In conclusion, PA and RE showed higher bond strength and closer adaptation than MA and BI whenindirect composite blocks were luted to dentin using a self-etching and three self-adhesive resin cements.